• Can virtually eliminate the need to use future raw materials to produce roofing.
• Is unaffected by hot-cold or wet-dry weather cycles that break down other materials.
• Has recycled content ranging from 25% to 95%.
• Is fully recyclable if it is removed, perhaps as part of a building renovation.
• Is low weight compared to other roofing materials, which helps extend the life of buildings, among other benefits.
• Does not pose a health risk.
• Is increasingly regarded for its energy efficiency.

Gone are the days of contractors having to justify the expense of metal roofing to customers, said Rob Haddock, founder of S-5!®, at METALCON in Rosemont, IL. Today, metal roofing is increasingly regarded as the premiere cost-saving, solar-mounting platform because, unlike other roofing systems, metal roofing can outlive PV systems by some 20-30 years, he said.

Haddock noted that the service life of Galvalume steel roofs is at least 50-60 years, far exceeding the service life of crystalline PV modules by some 20-30 years. “Roof replacement is not necessary,” he said. “The roof outlives the PV system.” He noted several benefits of metal roofing, including that it’s a highly recycled construction material, is relatively maintenance-free, and that PV systems can be mounted with zero roof penetration by using seam clamps.

Haddock pointed out that while traditional-generated energy is rising, the cost of solar systems has dropped by about a third in the last 5 years—from $3 per watt to about $1 per watt. Moreover, he said, “solar has a bright, sustainable future” as it gains support at the federal and state levels and among American consumers.

FireCreek Restaurant with Galvalume Roof

Currently, the Metal Construction Association is supporting a study on the longevity of the Galvalume standing-seam metal roof system. Engineer Ron Dutton told METALCON attendees that Galvalume roofing systems in various climates around the country are being quantitatively analyzed. Preliminary results show that the service life of the metal roofing system far exceeds the entire assumed 60-year service life of buildings. The final results of the study are expected 2013, he said.

Dutton noted several benefits of Galvalume, including that it has excellent long-term durability, life-cycle costing, and cut-edge protection. It can also be designed to various insulation requirements; has low maintenance costs; and is light weight, readily available, and competitively priced.

Nationwide, roofing contractors receive hundreds of calls a month from owners looking for solutions to end problems during the winter freeze and thaw cycles that can abuse certain roof systems.

Ice dams form during these cycles and create a tremendous amount of weight, lift shingles and cause roof leaks. Ice dams are mainly caused by heat loss that escapes out of the owners building at the eaves of the roof. These ice dams are adding to energy costs and shortening the lifecycle of the roof system. The solution requires adding additional insulation at the eaves and installing a metal roof.